1 The average monthly Social Security benefit paid to retired workers in 2015 is $1,335.97, or $16,031.64 a year. 2  The average monthly Social Security benefit paid to widows & widowers is $1,282.25, or $15,387.00 per year.
Like all hadrons, neutrons are made of quarks. A neutron is made of two down quarks and one up quark. One up quark has a charge of +2/3, and the two down quarks each have a charge of -1/3. The fact that these charges cancel out is why neutrons have a neutral (0) charge. Quarks are held together by gluons.
Effective Nuclear Charge Definition. The effective nuclear charge is the net charge an electron experiences in an atom with multiple electrons. The effective nuclear charge may be approximated by the equation: Zeff = Z - S. Where Z is the atomic number and S is the number of shielding electrons.